A steam heated boiler operates at pressures not exceeding __________ psi for steam

A steam heated boiler operates at pressures not exceeding __________ psi for steam

• A. 10
• B. 15
• C. 20
• D. 25

Answer: (B)

In steam heating, boilers are categorized by the maximum steam pressure they’re allowed to develop. A steam heated boiler is treated as low-pressure when the steam pressure does not exceed 15 psi. That 15-psi limit is what keeps safety controls, relief devices, and inspection requirements aligned with low-pressure equipment. While many residential steam systems actually run at much lower pressures, the 15 psi figure is the standard threshold used to define the low-pressure classification. If a boiler could produce more than 15 psi, it would be considered high-pressure and subject to more stringent safety standards.

In steam heating, boilers are categorized by the maximum steam pressure they’re allowed to develop. A steam heated boiler is treated as low-pressure when the steam pressure does not exceed 15 psi. That 15-psi limit is what keeps safety controls, relief devices, and inspection requirements aligned with low-pressure equipment. While many residential steam systems actually run at much lower pressures, the 15 psi figure is the standard threshold used to define the low-pressure classification. If a boiler could produce more than 15 psi, it would be considered high-pressure and subject to more stringent safety standards.